atlas: correctly size ArrayList in Rollups (#1161)

Netflix · Sep 23, 2024 · 3ab1fc4 · 3ab1fc4
1 parent a4e2f17
commit 3ab1fc4
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/spectator-reg-atlas/src/main/java/com/netflix/spectator/atlas/Rollups.java b/spectator-reg-atlas/src/main/java/com/netflix/spectator/atlas/Rollups.java
@@ -95,7 +95,7 @@ static RollupPolicy fromRules(Map<String, String> commonTags, List<RollupPolicy.
       }
 
       // Convert to final result type
-      List<RollupPolicy.Result> results = new ArrayList<>();
+      List<RollupPolicy.Result> results = new ArrayList<>(aggregates.size());
       for (Map.Entry<Map<String, String>, Map<Id, Aggregator>> entry : aggregates.entrySet()) {
         results.add(new RollupPolicy.Result(entry.getKey(), toMeasurements(entry.getValue())));
       }